<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>属性选择器</title>
<style>
    [type] {
        color: red;

    }
    [type=password]{
        color: blue;
    }
</style>
</head>
<body>
用户名<input type="text" /> <br/>
密码<input type="password" /> <br/>
邮箱<input type="email" /> <br/>

</body>
</html>